CN1088796C - Two stroke internal combustion engine - Google Patents
Two stroke internal combustion engine Download PDFInfo
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- CN1088796C CN1088796C CN97119389A CN97119389A CN1088796C CN 1088796 C CN1088796 C CN 1088796C CN 97119389 A CN97119389 A CN 97119389A CN 97119389 A CN97119389 A CN 97119389A CN 1088796 C CN1088796 C CN 1088796C
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- access
- chamber
- control valve
- mentioned
- firing chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/028—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation for two-stroke engines
- F02D13/0284—Variable control of exhaust valves only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B21/00—Engines characterised by air-storage chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
A control valve is disposed in a communication passage for communication between a combustion chamber and a chamber portion adjacent to the combustion chamber, and through the communication passage at least one of a fuel and an air-fuel mixture, and a highly compressed gas, are supplied or charged into the combustion chamber and the chamber portion adjacent thereto, respectively. The control valve includes a first control valve disposed in the first communication passage and a second control valve disposed in the second communication passage, the first control valve causes the first communication passage to open at a timing near closing of an exhaust port and causes it to close halfway in a compression stroke. The second control valve causes the second communication passage to open at a timing near closing of the scavenging ports and causes it to close prior to closing of the first communication passage.
Description
The present invention relates to stop the two stroke IC engine of gas blowby, raising combustion stability and the fuel firing rate and the exhaust purification performance of mixed gas in the firing chamber.Specifically, relate in the firing chamber and on the access between the chamber of this firing chamber, setting the control valve that can open and close this access, respectively to firing chamber fueling or mixed gas, supplying with the two stroke IC engine of high compressed air to chamber by this access.Be particularly related to the shape that makes access and control valve and position optimization, further improve the two stroke IC engine of its effect.
Existing two stroke IC engine, fuel and suction air mixing by supplies such as Carburetors, after this mixed gas is inhaled in the crank chamber, supply with the firing chamber by the ventilation opening, owing to set the open period of exhaust port than the open period of ventilation opening Zao (the opening upper limb of exhaust port is than the opening upper limb height of ventilation opening), so the mixed gas of supplying with in the firing chamber is discharged by exhaust passageway, is easy to generate so-called gas blowby.
Suppress though this gas blowby is deflated the exhaust pulsation effect in chamber, be difficult in the whole operation range and suppress, its result influences fuel firing rate and exhaust purification performance.
For this reason, open flat 3-100318 number and special opening proposed the two stroke IC engine that addresses this problem in flat 5-302521 number the Japanese patent gazette spy.
In the two stroke IC engine of Te Kaiping 3-100318 number record, the hyperbaric chamber communicates with crank chamber by check valve, this hyperbaric chamber communicates with air flue with the firing chamber, lower end at this air flue is installed with solenoid valve, in the upper end of this air flue, being provided with can be to the Fuelinjection nozzle of firing chamber burner oil.
In the two stroke IC engine of Te Kaiping 5-302521 number record, chamber and crank chamber and cylinder block are adjacent to set, between crank chamber and chamber, be provided with suction control valve, between the firing chamber of chamber and cylinder, be provided with the ventilation control valve, also be provided with the Fuelinjection nozzle of burner oil in chamber.
But, open in the two stroke IC engine of flat 3-100318 number record the spy, on cylinder sidewall, be provided with fuel supply opening towards the firing chamber, vertically setting Fuelinjection nozzle towards this opening, so the cylinder wall of spraying collision exhaust port side is being paid in the above easily.
In addition, for piston and spraying not being disturbed and being shifted to an earlier date time for spraying, then easily to the exhaust port gas blowby.Otherwise if in order to postpone time for spraying the fuel supply opening is provided in the high position, then Fuelinjection nozzle bears high-temperature combustion gas, and injection valve must have high-fire resistance.
Open in the two stroke IC engine of flat 5-302521 number record the spy,, supply with the firing chamber by whole ventilation openings from the mixed gas that the ventilation control valve sprays, so, the gas blowby of mixed gas can not be avoided from relief opening.
In order to solve above-mentioned problems of the prior art, the applicant once proposed the special flat 8-269366 number application of being willing to.
In this application, (this chamber is located at the side of this firing chamber side by side at firing chamber and chamber, link to each other with fuel injection system) between access on, setting the control valve that can open and close this access, by this access respectively to the firing chamber fueling, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to chamber in the 1st access, and mixed gas flows to the firing chamber from chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve when exhaust port is inaccessible near, the 1st access is communicated with, and in the compression stroke way, makes the 1st access obturation;
Above-mentioned the 2nd control valve when the ventilation opening is inaccessible near, the 2nd access is communicated with, and in the compression stroke way, the 1st access by obturation before, make the 2nd access obturation.
The above-mentioned application that the applicant proposes, owing to have above-mentioned structure, so, only to take a breath at the ventilation initial stage by air, mixed gas by in the firing chamber, stops the gas blowby of discharging to exhaust passageway as usual.In addition, the fuel (rich mixture) of supplying with the firing chamber flows in the firing chamber of fully having been taken a breath by above-mentioned air, becomes the moderate mixed gas of concentration in the firing chamber, can obtain good burning, can improve fuel firing rate and exhaust purification performance.
In addition, to chamber filling high compressed air, be to be undertaken by the 1st access from the firing chamber that is positioned under the compression stroke, so, when filling, can utilize the certain high pressure in the firing chamber, this with utilize pressure in the crank chamber to carry out filling before to compare because the throttle valve standard-sized sheet with the rising of engine rotation number not reduces thereby do not produce pressure, so, can obtain stable high chamber pressure (seeing Fig. 9, Figure 10) effectively.
In addition, because being used to form the high compressed air of rich mixture can obtain from the firing chamber, so, can chamber and control valve (rotary valve) in the access that the firing chamber is communicated be located near the firing chamber the cylinder wall being provided in, like this, can shorten the access length between control valve and the mixed gas injection opening (the combustion chamber side opening of the 2nd access), correspondingly can reduce making mixed gas move required air quantity by access.
Because moving the required time on this access, shortens fuel, this time factor reduces the influence of the setting in the valve period of opening of control valve, make out the setting in valve period easy, simultaneously, the control valve that sets is driven valve and is suitable for wider rotation number scope period easily.
As mentioned above, the applicant's above-mentioned application has various effects, but for these effects are brought into play more fully, for the access of firing chamber and chamber, the shape that is provided in the control valve in this access, position etc., also needs to do further improvement.
The present invention is exactly the improvement to the two stroke IC engine that has solved the problems referred to above, in the two stroke IC engine of the present invention program's 1 record, in the firing chamber and on the access between the chamber of this firing chamber, setting the control valve that can open and close this access, by this access respectively to firing chamber fueling or mixed gas, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to chamber in the 1st access, and mixed gas flows to the firing chamber from chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve when exhaust port is inaccessible near, the 1st access is communicated with, and in the compression stroke way, makes the 1st access obturation;
Above-mentioned the 2nd control valve when the ventilation opening is inaccessible near, the 2nd access is communicated with, and in the compression stroke way, the 1st access by obturation before, make the 2nd access obturation;
Above-mentioned the 1st access and the 2nd access by each opening of combustion chamber side, towards the cylinder-bore opening, and the upper end position of the combustion chamber side opening of the 1st access is not less than the upper end position of the combustion chamber side opening of the 2nd access.
The two stroke IC engine of the present invention program's 1 record, owing to have above-mentioned structure, so, after the 2nd access is by the 2nd control valve obturation (mixed gas is supplied with and finished), the 1st access is by the 1st control valve obturation (high compressed air sand off), and the combustion chamber side opening of these access also is positioned at the rising of the piston under the compression stroke and obturation in this order.Therefore, can get the set positions of the combustion chamber side opening of these access low as far as possible, so, can keep the exapnsion ratio of internal-combustion engine, keep its thermal efficiency.
In the two stroke IC engine of the present invention program's 2 records,, setting the control valve that can open and close this access in the firing chamber and on the access between the chamber of this firing chamber, by this access respectively to firing chamber fueling or mixed gas, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to chamber in the 1st access, and mixed gas flows to the firing chamber from chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve when exhaust port is inaccessible near, the 1st access is communicated with, and in the compression stroke way, makes the 1st access obturation;
Above-mentioned the 2nd control valve when the ventilation opening is inaccessible near, the 2nd access is communicated with, and in the compression stroke way, the 1st access by obturation before, make the 2nd access obturation;
Above-mentioned the 1st access and the 2nd access by each opening of combustion chamber side, towards the cylinder-bore opening, and the position of the combustion chamber side opening of the 2nd access is set at the initial stage that the 2nd access is communicated with at the 2nd control valve, not by the position of piston obturation.
The two stroke IC engine of the present invention program 2 record is owing to have above-mentioned structure, so the spray direction by the mixed gas of the shape adjustment of the 2nd access between from the control valve to the firing chamber is not confused by piston.Like this, good burning be can obtain, fuel firing rate and exhaust purification performance improved.
In the two stroke IC engine of the present invention program's 3 records,, setting the control valve that can open and close this access in the firing chamber and on the access between the chamber of this firing chamber, by this access respectively to firing chamber fueling or mixed gas, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to chamber in the 1st access, and mixed gas flows to the firing chamber from chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve when exhaust port is inaccessible near, the 1st access is communicated with, and in the compression stroke way, makes the 1st access obturation;
Above-mentioned the 2nd control valve when the ventilation opening is inaccessible near, the 2nd access is communicated with, and in the compression stroke way, the 1st access by obturation before, make the 2nd access obturation;
High compressed air in the 1st access from the firing chamber product of the path basal area of the pressure of the currency when chamber flows, this high compressed air, the 1st access, slightly equate with mixed gas product from the path basal area of the pressure of the currency of chamber when flow in the firing chamber, this mixed gas, the 2nd access in the 2nd path.
The two stroke IC engine of the present invention program's 3 records, owing to have above-mentioned structure, so, even the loading time to chamber filling high compressed air is short, can guarantee that also the required q.s high compressed air of mixed gas is supplied with in oriented firing chamber in the wide rotary area of chamber, can guarantee suitable fuel supply, obtain good spraying, carry out good combustion.
In addition and since can the 1st access by the area of combustion chamber side opening and the 1st access be reduced to inferior limit by the combustion chamber side volume, so, can keep the exapnsion ratio of internal-combustion engine, keep its thermal efficiency.
In the two stroke IC engine of the present invention program's 4 records,, setting the control valve that can open and close this access in the firing chamber and on the access between the chamber of this firing chamber, by this access respectively to firing chamber fueling or mixed gas, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to chamber in the 1st access, and mixed gas flows to the firing chamber from chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve when exhaust port is inaccessible near, the 1st access is communicated with, and in the compression stroke way, makes the 1st access obturation;
Above-mentioned the 2nd control valve when the ventilation opening is inaccessible near, the 2nd access is communicated with, and in the compression stroke way, the 1st access by obturation before, make the 2nd access obturation;
Above-mentioned to the filling period of chamber filling high compressed air with to the supply period of firing chamber supply mixed gas, set the period that overlaps for.
The two stroke IC engine of the present invention program's 4 records, owing to have above-mentioned structure, so, inner pressure of air cylinder (chamber pressure) is even change because of the operating conditions of internal-combustion engine, in chamber pressure and crank angle that inner pressure of air cylinder equates, always keeping can the filling high compressed air and supply with the state of mixed gas, so, can be in chamber effectively filling transport the required q.s high compressed air of mixed gas to the firing chamber, can guarantee provides an amount of mixed gas to the firing chamber.
As the invention of the present invention program's 5 records, be in each the described two stroke IC engine in the present invention program 1 to 4, it is characterized in that the 1st control valve and the 2nd control valve are arranged on the axle direction of solid of rotation abreast.So, the 1st control valve and the 2nd control valve easy to manufacture, the simple structure of their control mechanism.
Each invention of the present invention program's 1 to 5 record except having above-mentioned effect, also can be brought into play the effect that the applicant had before once filed an application respectively.
Fig. 1 is the profile diagram of the spark ignition two-stroke IC engine of one embodiment of the invention.
Fig. 2 is an enlarged view of wanting portion among Fig. 1.
Fig. 3 is another enlarged view of wanting portion among Fig. 1.
Fig. 4 is the cross-sectional profile along IV-IV line among Fig. 1.
Fig. 5 is the profile diagram of the rotary valve in embodiment illustrated in fig. 1.
Fig. 6 is the sectional drawing along VI-VI line among Fig. 5.
Fig. 7 is the sectional drawing along the VIII-VIII line among Fig. 5.
Fig. 8 is that explanation is embodiment illustrated in fig. 1, spark ignition two-stroke IC engine operation circuit figure.
Fig. 9 is that expression is embodiment illustrated in fig. 1, the figure of spark ignition two-stroke IC engine roadability.
Roadability figure when Figure 10 is embodiment illustrated in fig. 1, another different conditions of spark ignition two-stroke IC engine of expression.
Below, explanatory drawing 1 is to one of the invention of the present invention program shown in Figure 10 1 to 5 record
Embodiment.
Fig. 1 is the profile diagram of the spark ignition two-stroke IC engine in the present embodiment.Fig. 2 and Fig. 3 are respectively the different enlarged views of portion of wanting among Fig. 1.Fig. 4 is the cross-sectional profile along IV-IV line among Fig. 1.Fig. 5 is the profile diagram of rotary valve.Fig. 6 and Fig. 7 are respectively along the sectional drawing of VI-VI line and VIII-VIII among Fig. 5.Fig. 8 is expression spark ignition two-stroke IC engine operation circuit figure.Fig. 9 and Figure 10 are the figure of expression spark ignition two-stroke IC engine roadability.Fig. 9 is the graph of a relation of expression each pressure during full trrottle, crank angle, crank box interior with cylinder, chamber.Figure 10 is the figure that the expression throttle valve is opened each pressure dependence, interior, the crank box of crank angle and cylinder, chamber at 20% o'clock.
In these figure, Mars formula igniting type two stroke IC engine 1 is installed on the motor bike that figure do not show, in this spark ignition two-stroke IC engine 1, cylinder block 3 and cylinder head 4 are stacked in the top of crank box 2 successively, and is bonded to each other and is integral.
Piston 6 can slide up and down to be inlaid in the cylinder-bore 5, and this cylinder-bore 5 is formed on the cylinder block 3.Piston 6 is interconnected by connecting rod 7 with crankshaft 8, and crankshaft 8 is driven rotation along with the lifting of piston 6.
Be connected with the air suction way 10 of crank box 2 from the air suction way 10 of vehicle body rear directed forward, on this air suction way 10, throttle valve (figure does not show) and pilot valve 12 in series are installed, throttle valve is connected with throttle grip (figure does not show) by the connected element that figure does not show, when a direction was reversed, the aperture of throttle valve just increased with throttle grip.
On crank box 2 and cylinder block 3, form totally 5 air supply ventilation paths 14,15,42. Ventilation path 14,15 is communicated with the top and the crank chamber 9 of cylinder-bore 5, about respectively 2 totally 4.The air at rear is supplied with ventilation path 42 and is taken into the lower opening of using opening 31 with opening 34 and high compressed air towards aftermentioned mixed gas (fuel) supply.Their end by cylinder-bore 5 sides becomes opening 16,17,43, towards these cylinder-bore 5 openings.Air is supplied with ventilation path 42 and is directly linked to each other with the air suction way 10 of the rear flow side crank box 2 of pilot valve 12.
The slightly hemispherical firing chamber 13 of cylinder-bore 5 tops is provided with near exhaust port 22, is setting igniter plug 23 in this firing chamber 13.
Be positioned near on the cylinder block 3 vehicle body rear, 13 sides, firing chamber, be provided with chamber 29 abreast.In the valve receiving bore 40 in the 1st access (high compressed air path) the 30, the 2nd access (mixed gas path) 33 ways that are communicated with this chamber 29 and firing chamber 13, setting-in rotatable rotary valve 36, this rotary valve 36 schemed the driving mechanism that do not show towards the direction (in Fig. 1 up time meter direction) opposite with crankshaft 8 with same rotational speed rotary driving.Belt pulley 39 is installed in an end of rotary valve 36, is erected at (see figure 4) on the driving mechanism that above-mentioned figure do not show.
In the 1st access 30, high compressed air 13 flows to chamber 29 from the firing chamber.In the 2nd access, the high compressed air before mixed gas or this mixed gas form flows to firing chamber 13 from chamber 29.The high compressed air in this two access 30,33 and the air-flow of mixed gas,, be communicated with, block with preset time respectively to ground shown in Figure 7 as Fig. 5 by one the 1st control valve (high compressed air filling control valve) 38 and another the 2nd control valve (mixed gas injection control valve) 37.Above-mentioned the 1st control valve 38 constitutes rotary valve 36, is provided in the 1st access 30.Above-mentioned the 2nd control valve 37 constitutes rotary valve 36, sets in the 2nd access 33.
As shown in Figure 4, (about among the figure being) 2 positions about the 1st access 30 is located at, about the 1st control valve 38 is set in the access 30 at two positions respectively, between the access 30 at left two positions, disposing the 2nd access 33.
Among Fig. 5 to Fig. 7, the sectional view of the rotary valve 36 that expression and the 1st control valve 38 and the 2nd control valve 37 are arranged side by side.The 1st control valve 38 forms crescent shaped, and this crescent shaped connects the circular arc two ends as the solid of rotation periphery predetermined length of rotary valve 36 base materials and cut with straight line and forms.The 2nd control valve 37 forms the otch in Zhou Fangxiang predetermined length, predetermined depth, for the spraying that makes mixed gas becomes the slick and sly shape of straight line, does not form step at its front end.
The shape and the position relation of the 1st access the 30, the 2nd access the 33, the 1st control valve the 38, the 2nd control valves 37 etc. are as set followingly.
Firing chamber 13 side openings of the 1st access 30 are that high compressed air is taken into the upper end position h with opening 31
1Set highly, making its firing chamber that is not less than the 2nd access 33 13 side openings is that mixed gas is supplied with the upper end position h with opening 34
2This mixed gas is supplied with and is set like this with the position of opening 34: at the initial stage that the 2nd control valve 37 is communicated with the 2nd access 33, for this opening 34 not by the piston obturation, this mixed gas is supplied with the S (variable) (seeing Fig. 1 to Fig. 3) that keeps at a distance between on the lower end of opening 34 and piston 6 peripheries.
In the 1st access 30,13 currency, the pressure of this high compressed air, high compressed airs when chamber 29 flows are taken into product with the area three of opening 31 to high compressed air from the firing chamber, with in the 2nd access 33, the product that mixed gas is supplied with the area three of opening 34 from currency, the pressure of this mixed gas, the mixed gas of chamber 29 when flow in firing chamber 13 slightly equates.
The switching time of the 1st control valve the 38, the 2nd control valve 37 is as follows.
In conjunction with reference to Fig. 8 to Figure 10, the 1st control valve 38 when exhaust port 22 inaccessible near, the 1st access 30 is communicated with, in the compression stroke way, make the 1st access 30 obturations, around here, be taken into opening 31, the high compressed air in the firing chamber 13 be taken into be filled to chamber 29 interior (b among Fig. 9 and Figure 10) from the high compressed air that faces firing chamber 13.32 is openings by chamber 29 1 sides of the 1st access 30.
The 2nd control valve 37 is communicated with the 2nd access 33 near when ventilation opening 16,17,43 is inaccessible, and, in the compression stroke way, between the 1st access 30 is by obturation, make the 2nd access 33 obturations, around here, from chamber 29 in firing chamber 13, spray supply with mixed gas (Fig. 9 and Figure 10 a).Like this, in filling period of filling high compressed air and supply with supply period of mixed gass in chamber 29, be configured to the period (c among Fig. 9 and Figure 10) that overlaps for having to firing chamber 13.
Mixed gas such as following formation.
As shown in Figure 4, the left and right sides at chamber 29, fuel injection system 41 left and right symmetricallies are installed on the cylinder block 3, fuel from these fuel injection systems 41 injections, before the 2nd control valve 37 makes 33 connections of the 2nd access, in the mixed gas that the otch of the 2nd control valve 37 faces forms with space 44 (see figure 3)s, from the ejection of two skew backs below.The summary central part at the 2nd access 33 is seen in its ejection position from the plane, in this position, chamber 29 links to each other with fuel injection system 41 by forming with space 44 by chamber 29 side openings 35, mixed gas of the 2nd access 33.
When the 2nd control valve 37 is communicated with the 2nd access 33, the high compressed air that is filled in the chamber 29 flows in the 2nd access 33 from opening 35, the fuel mix of with standby, form mixed gas on one side, by the high pressure force feed in the chamber 29, supply with opening 34 from mixed gas and be ejected in the firing chamber 13 on one side.
Diagram spark ignition two-stroke IC engine 1 with above-mentioned structure, its action is as follows.
As shown in Figure 8, in the preceding 90 ° moment of upper dead center (TDC), exhaust port 22 is entered compression stroke by piston 6 obturations during meter direction rotary driving inverse time in Fig. 1 when crankshaft 8 is schemed the starter motor do not shown.So the 1st control valve 38 is opened, the 1st access 30 is communicated with, the high compressed air in the firing chamber 13 is taken into opening the 31, the 1st access 30, opening 32 by high compressed air and is filled in the chamber 29.
In the moment of 75 ° of upper dead center (TDC) precontracts, the mixed gas by the combustion chamber side end of the 2nd access 33 is supplied with opening 34 by piston 6 obturations, then, high compressed air is taken into opening 31 by piston 6 obturations, supplies with, finishes successively to the filling of the high compressed air of chamber 29 to the mixed gas of firing chamber 13.
Firing chamber 13 is compressed, and at the predetermined instant of before top dead center, igniter plug 23 is lighted a fire, and because of the rising of piston 6, crank chamber 9 continues exapnsion, air-breathing proceeding.
After arriving upper dead center (TDC), the mixture combustion exapnsion in the firing chamber 13, simultaneously, because of the decline of piston 6, crank chamber 9 is compressed, and the air in the crank chamber 9 is compressed.
Passed through moment (in the change of the upper-lower position of gas exhausting valve 24) of 90 ° from upper dead center (TDC), exhaust port 22 is open, and combustion gas are discharged from exhaust passageway 21.
Passed through 122 ° the moment approximately from upper dead center (TDC), the decline of piston 6 makes ventilation opening 16,17,43 openings, pressurized air (not comprising fuel) in the crank chamber 9 is supplied with ventilation path 14,15,42 by air and is flowed into firing chamber 13 from ventilation opening 16,17,43, combustion gas in firing chamber 13 are discharged towards the direction of exhaust port 22, are only taken a breath by air.Meanwhile, from the fuel of fuel injection system 41 ejection, the mixed gas that is faced with to the otch of the 2nd control valve 37 forms with spraying in the space 44.
Then, passed through moment of 58 ° approximately from lower dead centre (BDC), ventilation opening 16,17,43 is inaccessible because of the rising of piston 6, stops to flow into from the air of ventilation opening 16,17,43, has promptly stopped ventilation.Simultaneously, from this moment, the 2nd control valve 37 is communicated with the 2nd access 33, and mixed gas is supplied with from mixed gas and is ejected in the firing chamber 13 with opening 34.Simultaneously, because of the rising of piston 6 causes crank chamber 9 exapnsions, air is inhaled in the crank chamber 9 through pilot valves 12 from air suction way 10.When the injection of above-mentioned mixed gas, almost completely be provided with the gas blowby of this mixed gas.
The spark ignition two-stroke IC engine 1 of present embodiment, above-mentioned structure reaches as above-mentioned earthquake is done because of it has, so have following effect.
As previously mentioned, in diagram spark ignition two-stroke IC engine 1, only take a breath by air at the ventilation initial stage, so mixed gas can prevent the gas blowby of discharging to exhaust passageway 21 as usual by in the firing chamber 13, improve fuel firing rate, and prevent the pollution of unburned gas atmosphere.
Be filled to high compressed air in the chamber 29 and the fuel that ejects from fuel injection system 41, in the 2nd access 33, generate rich mixture, this rich mixture flows into to be supplied with by air in the firing chamber 13 of fully having taken a breath with the air that does not contain fuel of the path 14,15,42 of taking a breath, so, in this firing chamber 13, become the moderate mixed gas of concentration, good burning be can obtain, fuel firing rate and exhaust purification performance improved.
Because high compressed air is taken into the upper end position with opening 31, supply with the upper end position of opening 34 low unlike mixed gas, so, after the 2nd access 33 is by the 2nd control valve 37 obturations (mixed gas is supplied with and finished), the 1st access 30 is by the 1st control valve 38 obturations (high compressed air sand off), these access 30,33 be that high compressed air is taken into opening 31, mixed gas supply and also is positioned at the rising of the piston under the compression stroke in this order and obturation with opening 34 by the combustion chamber side opening.Therefore, can these high compressed airs be taken into opening 31, mixed gas supply with set positions with opening 34 get low as far as possible, so, can keep the exapnsion ratio of internal-combustion engine 1, keep its thermal efficiency.
Suppose, high compressed air is taken into the upper end position of using opening 31, set to such an extent that supply with the upper end position of opening 34 low than mixed gas.Then, before the 1st access 30 is by the 1st control valve 38 obturations, for the flowing of choking flow not through the high compressed air of the 1st access 30, must be set in very eminence to the upper end position that high compressed air is taken into opening 31, but, blocked the 2nd access 33 is that mixed gas is supplied with the upper end position with opening 34 by the combustion chamber side opening between the 1st access 30 is by the 1st control valve 38 obturations, unnecessarily be higher than high compressed air and be taken into the upper end position of using opening 31, so, generally, these openings 31,34 upper end position is formed on high bit, its result, the exapnsion ratio of internal-combustion engine 1 reduces, and can not keep its thermal efficiency.
In addition, make the 33 connection initial stages of the 2nd access at the 2nd control valve 37, supply with opening 34 not by the piston obturation in order to make mixed gas, with the S (variable) that keeps at a distance between the position of this opening 34 and the piston 6 peripheries upper end, so, the spray direction of mixed gas is not confused this spray direction by the shape adjustment from the 2nd control valve 37 to the 2nd access 33 the firing chamber 13 by piston 6.Thereby, can obtain good burning, improve fuel firing rate and exhaust purification performance.
In addition, because in the 1st access 30, high compressed air is 13 currencies when chamber 29 flows from the firing chamber, the pressure of this high compressed air, high compressed air is taken into the product with the area three of opening 31, with in the 2nd access 33, mixed gas is from the currency of chamber 29 when flow in firing chamber 13, the pressure of this mixed gas, the product that mixed gas is supplied with the area three of opening 34 slightly equates, so, from Fig. 8 to Figure 10 as seen, even high compressed air (pressurized gas) is short to the loading time of chamber 29, be taken into the area of using opening 31 by pressure and the high compressed air that increases high compressed air, under the effect that this three's product equates, high compressed air amount toward chamber 29 interior fillings, basically offset with the air-fuel mixture amount of supplying with to the firing chamber, like this, can guarantee that wide rotary area is a high compressed air from the required q.s of mixed gas to the firing chamber that supply with to inner cavity chamber's 29 fillings, makes fuel supply in good condition, obtain good spraying, carry out good burning.
In addition, in this case, the currency of each fluid, pressure, distribution channel basal area are not limited to locational these values by firing chamber 13 side openings 31,34 of the 1st access 30 and the 2nd access 33, also can select these values at the 1st control valve 38 and the 2nd control valve 37 each all direction incision sites place.At this moment,, make deeplyer, like this, can obtain and above-mentioned same effect (seeing Fig. 6, Fig. 7) than the 2nd control valve 37 all direction notch depths that are provided on the 2nd access 33 the 1st control valve 38 all direction notch depths that are provided on the 1st access 30.
As previously mentioned, both long-pending be set at slightly equate, high compressed air can be taken into the area with opening 31, the firing chamber 13 side volumes of the 1st access 30, be restricted to inferior limit, so, can keep the exapnsion ratio of internal-combustion engine 1, keep its thermal efficiency.
In addition, because to chamber 29 filling high compressed airs in filling period, with supply period from mixed gas to firing chamber 13 that supply with, setting becomes the period that coincidence is arranged mutually, so, inner pressure of air cylinder (firing chamber 13 internal pressures) is even change because of the operating conditions of internal-combustion engine 1, in the pressure of chamber 29 and crank angle that inner pressure of air cylinder equates, the state that is always keeping energy filling high compressed air and supply mixed gas, so, can be in chamber 29 effectively filling transport the required q.s high compressed air of mixed gas to firing chamber 13, can guarantee provides an amount of mixed gas to firing chamber 13.
The 1st control valve 38 and the 2nd control valve 37 are arranged side by side at the axial direction as the solid of rotation of rotary valve 36 base materials, as changing the rotary valve that the phase place one connects, so the manufacturing of these control valves and the formation of control mechanism thereof are easy.
In addition, the spark ignition two-stroke IC engine 1 of present embodiment also has the effect of the two stroke IC engine of the previous application of above-mentioned the applicant.
Claims (5)
1. a two stroke IC engine in the firing chamber and on the access between the chamber of this firing chamber, is setting the control valve that can open and close this access, by this access respectively to firing chamber fueling or mixed gas, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from above-mentioned firing chamber to above-mentioned chamber in the 1st access, and mixed gas flows to above-mentioned firing chamber from above-mentioned chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve when exhaust port is inaccessible near, the 1st access is communicated with, and in the compression stroke way, makes the 1st access obturation;
Above-mentioned the 2nd control valve when the ventilation opening is inaccessible near, the 2nd access is communicated with, and in the compression stroke way, before the 1st access is by obturation, makes the 2nd access obturation;
Above-mentioned the 1st access and the 2nd access by each opening of combustion chamber side, towards the cylinder-bore opening, and the upper end position by the combustion chamber side opening of the 1st access is not less than the upper end position by the combustion chamber side opening of the 2nd access.
2. a two stroke IC engine in the firing chamber and on the access between the chamber of this firing chamber, is setting the control valve that can open and close this access, by this access respectively to above-mentioned firing chamber fueling or mixed gas, supply with high compressed air to above-mentioned chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to above-mentioned chamber in the 1st access, and mixed gas flows to above-mentioned firing chamber from above-mentioned chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve is communicated with the 1st access near the exhaust port obturation, and makes the 1st access obturation in the compression stroke way;
Above-mentioned the 2nd control valve is communicated with the 2nd access near ventilation opening obturation, and the 1st access in the compression stroke way by obturation before, make the 2nd access obturation;
Above-mentioned the 1st access and the 2nd access by each opening of combustion chamber side, towards the cylinder-bore opening, and the set positions by the combustion chamber side opening of the 2nd access is, at the initial stage that the 2nd control valve is communicated with the 2nd access, not by the position of piston obturation.
3. a two stroke IC engine in the firing chamber and on the access between the chamber of this firing chamber, is setting the control valve that can open and close this access, by this access respectively to firing chamber fueling or mixed gas, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to chamber in the 1st access, and mixed gas flows to the firing chamber from chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve is communicated with the 1st access near the exhaust port obturation, and makes the 1st access obturation in the compression stroke way;
Above-mentioned the 2nd control valve is communicated with the 2nd access near ventilation opening obturation, and the 1st access in the compression stroke way by obturation before, make the 2nd access obturation;
In the 1st access, the pressure of the high compressed air currency when chamber flows, this high compressed air, the path basal area three's of the 1st access product from the firing chamber, with in the 2nd access, mixed gas equates from the path basal area three's of the pressure of the currency of chamber when flow in the firing chamber, this mixed gas, the 2nd access product.
4. a two stroke IC engine in the firing chamber and on the access between the chamber of this firing chamber, is setting the control valve that can open and close this access, by this access respectively to firing chamber fueling or mixed gas, supply with high compressed air to chamber, it is characterized in that
Above-mentioned access is made of the 1st access and the 2nd access, and high compressed air flows from the firing chamber to chamber in the 1st access, and mixed gas flows to the firing chamber from chamber in the 2nd access;
Above-mentioned control valve is made of the 2nd control valve that is located at the 1st control valve in the 1st access and be located in the 2nd access;
Above-mentioned the 1st control valve is communicated with the 1st access near the exhaust port obturation, and makes the 1st access obturation in the compression stroke way;
Above-mentioned the 2nd control valve is communicated with the 2nd access near ventilation opening obturation, and the 1st access in the compression stroke way by obturation before, make the 2nd access obturation;
Above-mentioned to the filling period of chamber filling high compressed air with to the supply period of firing chamber supply mixed gas, set the period that overlaps for.
5. as each the described two stroke IC engine in the claim 1 to 4, it is characterized in that the 1st control valve and the 2nd control valve are the axle direction that is arranged on solid of rotation abreast, and be integral the rotary valve of connection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP150378 | 1997-05-24 | ||
| JP15037897A JP3778319B2 (en) | 1997-05-24 | 1997-05-24 | 2-cycle internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1200433A CN1200433A (en) | 1998-12-02 |
| CN1088796C true CN1088796C (en) | 2002-08-07 |
Family
ID=15495696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97119389A Expired - Fee Related CN1088796C (en) | 1997-05-24 | 1997-09-30 | Two stroke internal combustion engine |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5960749A (en) |
| JP (1) | JP3778319B2 (en) |
| CN (1) | CN1088796C (en) |
| AU (1) | AU723794B2 (en) |
| CA (1) | CA2216593C (en) |
| FR (1) | FR2763640B1 (en) |
| IT (1) | IT1295445B1 (en) |
| TW (1) | TW355192B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6460494B1 (en) * | 2000-06-07 | 2002-10-08 | Design & Manufacturing Solutions, Inc. | Compressed air assisted fuel injection system with reflection wave and variable restriction injection port |
| JP2002081305A (en) * | 2000-07-04 | 2002-03-22 | Honda Motor Co Ltd | Lubricating method for two-cycle internal combustion engine |
| JP2002081323A (en) | 2000-07-07 | 2002-03-22 | Honda Motor Co Ltd | Two-cycle internal combustion engine |
| JP2002089270A (en) | 2000-07-14 | 2002-03-27 | Honda Motor Co Ltd | Two-cycle internal combustion engine |
| JP2002070560A (en) | 2000-09-04 | 2002-03-08 | Honda Motor Co Ltd | Assist gas fuel injection mechanism for 2-cycle internal combustion engine |
| US8770159B2 (en) * | 2008-09-24 | 2014-07-08 | Makita Corporation | Stratified scavenging two-stroke engine |
| JP6035197B2 (en) * | 2013-04-30 | 2016-11-30 | 株式会社マキタ | Stratified scavenging two-stroke engine |
| JP6042767B2 (en) * | 2013-04-30 | 2016-12-14 | 株式会社マキタ | Stratified scavenging two-stroke engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002144A1 (en) * | 1989-08-10 | 1991-02-21 | Knitted Sleeve (Overseas) Ltd. | Improved two stoke cycle spark ignition internal combustion engine |
| WO1995004212A1 (en) * | 1993-08-03 | 1995-02-09 | Masse Jean Marc | Fuel-air mixture feed device for a two-stroke internal combustion engine |
| EP0831214A1 (en) * | 1996-09-19 | 1998-03-25 | Honda Giken Kogyo Kabushiki Kaisha | Two-cycle internal combustion engine |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1594664A (en) * | 1924-07-26 | 1926-08-03 | Congellier Anton | Internal-combustion engine |
| US1722951A (en) * | 1926-12-29 | 1929-07-30 | Jean A H Barkeij | Internal-combustion engine |
| US2796054A (en) * | 1955-07-29 | 1957-06-18 | Harold A Miller | Two cycle engine charge recirculator |
| US4753198A (en) * | 1986-02-04 | 1988-06-28 | Heath Kenneth E | Compression ratio control mechanism for internal combustion engines |
| FR2613422A1 (en) * | 1987-04-06 | 1988-10-07 | Curtil Remi | METHOD FOR PROVIDING AN INTERNAL COMBUSTION ENGINE AND AUTOSURALIMENTATION BY POST-FILLING AT AT LEAST ONE TWO-CYLINDER |
| AT408256B (en) * | 1989-07-31 | 2001-10-25 | Avl Verbrennungskraft Messtech | DEVICE FOR INPUTING FUEL INTO THE COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE |
| JPH03100318A (en) * | 1989-09-12 | 1991-04-25 | Nissan Motor Co Ltd | Two-stroke internal combustion engine |
| JP2761412B2 (en) * | 1989-10-17 | 1998-06-04 | 三信工業株式会社 | In-cylinder internal combustion engine |
| DD294540A5 (en) * | 1990-05-17 | 1991-10-02 | Th Zwickau,De | MIXING CHAMBER ENGINE |
| US5243528A (en) * | 1990-09-12 | 1993-09-07 | Motorola, Inc. | Land vehicle navigation apparatus with visual display |
| PL174629B1 (en) * | 1994-08-16 | 1998-08-31 | Jarnuszkiewicz Stanislaw | Spark-ignited two-stroke internal combustion engine |
| JP3765335B2 (en) * | 1995-09-19 | 2006-04-12 | 本田技研工業株式会社 | 2-cycle internal combustion engine |
-
1997
- 1997-05-24 JP JP15037897A patent/JP3778319B2/en not_active Expired - Fee Related
- 1997-09-25 AU AU39251/97A patent/AU723794B2/en not_active Ceased
- 1997-09-26 TW TW086114083A patent/TW355192B/en active
- 1997-09-29 IT IT97TO000856A patent/IT1295445B1/en active IP Right Grant
- 1997-09-29 US US08/940,029 patent/US5960749A/en not_active Expired - Fee Related
- 1997-09-29 CA CA002216593A patent/CA2216593C/en not_active Expired - Fee Related
- 1997-09-29 FR FR9712081A patent/FR2763640B1/en not_active Expired - Fee Related
- 1997-09-30 CN CN97119389A patent/CN1088796C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002144A1 (en) * | 1989-08-10 | 1991-02-21 | Knitted Sleeve (Overseas) Ltd. | Improved two stoke cycle spark ignition internal combustion engine |
| WO1995004212A1 (en) * | 1993-08-03 | 1995-02-09 | Masse Jean Marc | Fuel-air mixture feed device for a two-stroke internal combustion engine |
| EP0831214A1 (en) * | 1996-09-19 | 1998-03-25 | Honda Giken Kogyo Kabushiki Kaisha | Two-cycle internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1200433A (en) | 1998-12-02 |
| TW355192B (en) | 1999-04-01 |
| AU3925197A (en) | 1998-11-26 |
| ITTO970856A1 (en) | 1999-03-29 |
| FR2763640B1 (en) | 2001-09-21 |
| FR2763640A1 (en) | 1998-11-27 |
| JPH10325323A (en) | 1998-12-08 |
| US5960749A (en) | 1999-10-05 |
| JP3778319B2 (en) | 2006-05-24 |
| CA2216593C (en) | 2005-03-22 |
| AU723794B2 (en) | 2000-09-07 |
| CA2216593A1 (en) | 1998-11-24 |
| IT1295445B1 (en) | 1999-05-12 |
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